/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraSimCache.h
Reads Niagara Position attributes by name from the cache frame and appends them into the OutValues array. All attributes read with this method will be re-based from the captured space into the provided transform space, this will occur even if the cache was not captured with re-basing enabled. EmitterName - If left blank will return the system simulation attributes.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=NiagaraSimCache) void ReadPositionAttributeWithRebase ( [TArray](API\Runtime\Core\Containers\TArray)< FVector > & OutValues, FTransform Transform, [FName](API\Runtime\Core\UObject\FName) AttributeName, [FName](API\Runtime\Core\UObject\FName) EmitterName, int FrameIndex ) const